142623317 has 4 divisors (see below), whose sum is σ = 143110380. Its totient is φ = 142136256.

The previous prime is 142623311. The next prime is 142623323. The reversal of 142623317 is 713326241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713326241 = 41 ⋅17398201.

It is an interprime number because it is at equal distance from previous prime (142623311) and next prime (142623323).

It can be written as a sum of positive squares in 2 ways, for example, as 94750756 + 47872561 = 9734^2 + 6919^2 .

It is a cyclic number.

It is not a de Polignac number, because 142623317 - 2¹⁸ = 142361173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142623317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142623311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243092 + ... + 243677.

It is an arithmetic number, because the mean of its divisors is an integer number (35777595).

Almost surely, 2^142623317 is an apocalyptic number.

It is an amenable number.

142623317 is a deficient number, since it is larger than the sum of its proper divisors (487063).

142623317 is an equidigital number, since it uses as much as digits as its factorization.

142623317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487062.

The product of its digits is 6048, while the sum is 29.

The square root of 142623317 is about 11942.5004500733. The cubic root of 142623317 is about 522.4725893910.

Adding to 142623317 its reverse (713326241), we get a palindrome (855949558).

The spelling of 142623317 in words is "one hundred forty-two million, six hundred twenty-three thousand, three hundred seventeen".